One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,7)(3,8,4,6)(17,18,20,25,21,24,29,23)(19,26,28,31,27,22,30,32)(1,3,5,4)(2,6,7,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,22)(20,28)(21,27)(23,31)(24,26)(25,32)(29,30)(10,13)(14,16)(17,18)(19,22)(20,23)(21,24)(25,29)(26,27)(28,31)(30,32) involution — undirected(1,4,5,3)(2,6,7,8)(9,11)(10,14)(12,15)(13,16)(19,27)(22,26)(28,30)(31,32)(11,15)(14,16)(17,20,21,29)(18,23,24,25)(19,28,27,30)(22,31,26,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.